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ID = 15630
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Transmitting Triode, air cooled   VHF 
Identical to CV63 = E1323
Similar Tubes
Normally replaceable-slightly different:

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uc)
Was used by Military and/or Government
Filament Vf 6.3 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC

Horned Triode. Peak Ia <500mA, Peak Va <2500V.
The Correct Heater current is 0,8A not 0.15 as stated in the Codex 1948/49.
Two used in the transmitter of the Rebecca Mk II transponder at about 220MHz.

Dimensions (WHD)
incl. pins / tip
x 119 x 39 mm / x 4.69 x 1.54 inch
Weight 37 g / 1.31 oz
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

2c22_3.png CV63: Manufacturer's Literature
Emilio Ciardiello

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Just Qvigstad
CV63: Manufacturer's Literature
Emilio Ciardiello

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